Showing results for 
Search instead for 
Did you mean: 


  I have an Internet Multihoming scenario in which Router A is connected to ISP1 and Router B is connected to ISP2.I have an EBGP running bw A and ISP1 & B and ISP2.Also I have IBGP bw A and B.My IP blocks are advertised in both ISP's and we are trying to achieve load balacing.Both my WAN links to ISP is in Active-Active.In addition to it, I have MHSRP configured in my LAN interface.

Now I have enabled nat on the Wan interface connecting to ISP1 and ISP2.I noticed :ip virtual reassembly command automatically appearing on the WAN interface.After some time,I noticed some error logs in my router :

May 10 10:05:58.645: %IP_VFR-4-FRAG_TABLE_OVERFLOW: GigabitEthernet0/1: the fragment table has reached its maximum threshold 16

Does this error cause any impact on my application ?

Can i remove this command from the interface ? Will my production get affected if i try to do this ?


from what I understand NAT automatically enables VFR if NAT is enabled...does the message happen often?

if it happens often there may be possibility of a buffer overflow attack...

paolo bevilacqua
Hall of Fame Master Hall of Fame Master
Hall of Fame Master

Questions should go in Discussions, not Documents.

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Quick Links